<template>
  <div :class="{ hidden: hidden }" class="pagination-container">
    <el-pagination
      :background="background"
      :current-page.sync="currentPage"
      :page-size.sync="pageSize"
      :layout="layout"
      :page-sizes="pageSizes"
      :pager-count="pagerCount"
      :total="total"
      v-bind="$attrs"
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
    />
  </div>
</template>

<script>
export default {
  name: "Pagination",
  props: {
    total: {
      required: true,
      type: Number,
    },
    page: {
      type: Number,
      default: 1,
    },
    limit: {
      type: Number,
      default: 20,
    },
    pageSizes: {
      type: Array,
      default() {
        return [10, 20, 30, 50];
      },
    },
    // 移动端页码按钮的数量端默认值5
    pagerCount: {
      type: Number,
      default: document.body.clientWidth < 992 ? 5 : 7,
    },
    layout: {
      type: String,
      default: "total, sizes, prev, pager, next",
      //   default: 'total, sizes, prev, pager, next, jumper'//靠左
      // default: "->,total, sizes, prev, pager, next, jumper",//靠右
    },
    background: {
      type: Boolean,
      default: true,
    },
    // autoScroll: {
    //   type: Boolean,
    //   default: true
    // },
    hidden: {
      type: Boolean,
      default: false,
    },
  },
  data() {
    return {};
  },
  computed: {
    currentPage: {
      // computed中的get方法可简单理解为取值时调用此方法，而set则为重新赋值时调用。
      get() {
        return this.page;
      },
      // 只有当computed监测的值变化的时候，set才回被调用
      set(val) {
        this.$emit("update:page", val);
      },
    },
    pageSize: {
      get() {
        return this.limit;
      },
      set(val) {
        this.$emit("update:limit", val);
      },
    },
  },
  methods: {
    handleSizeChange(val) {
      // console.log(val);
      // if (this.currentPage * val > this.total) {
        this.currentPage = 1;
      // }
      this.$emit("pagination", { page: this.currentPage, limit: val });
      //   if (this.autoScroll) {
      //     scrollTo(0, 800)
      //   }
    },
    handleCurrentChange(val) {
      this.$emit("pagination", { page: val, limit: this.pageSize });
      //   if (this.autoScroll) {
      //     scrollTo(0, 800)
      //   }
    },
  },
};
</script>

<style scoped>
/* .pagination-container {
  background: #fff;
  padding: 32px 16px;
}
.pagination-container.hidden {
  display: none;
} */
</style>
